What assigning a task actually does
When you assign a task in Outlook, you send someone else a task request that they can accept or decline. Once they accept, that task appears on their task list with their name as the owner — not yours. You are not delegating work you still have to track; you are handing off the responsibility entirely. The person you assign it to can edit the due date, add notes, or mark it complete without asking your permission.
This is different from forwarding an email or sharing a to-do list. When you assign a task, Outlook creates a formal request that the other person has to respond to. If they accept, you get a notification. If they decline, the task comes back to you and stays on your list.
Key Takeaways
- Assigning a task sends a request to another person; they must accept it for it to move to their task list.
- You can only assign tasks to people in your organization or contacts who use Outlook or Microsoft Teams.
- The person you assign to can change the due date, add details, or mark it complete on their own — you do not control it after they accept.
- If they decline the assignment, the task returns to your list and you keep ownership.
- You can see whether someone has accepted, declined, or not yet responded to a task assignment.
How to assign a task in Outlook on desktop
Open Outlook and go to the Tasks section. You can find this in the left sidebar — it may say "Tasks" or show a checkmark icon depending on your version. Click "New Task" or the plus sign to create a new task.
Fill in the task title, due date, and any details you want to include. Then look for the "Assign Task" button. In most versions of Outlook, this appears in the ribbon at the top of the task window, or you may see an "Assign" option in the task details. Click it.
A field will appear asking you to enter the name or email of the person you want to assign the task to. Type their name or email address. Outlook will search your contacts and show matching names. Select the correct person from the list. Then click "Send" or "Assign" to send them the task request.
How to assign a task in Outlook on the web
Log into Outlook.com or your organization's Outlook web version. Click the Tasks icon in the left sidebar (it looks like a checkmark in a circle). Click "New Task" to create a task.
Enter the task title, due date, and description. Look for the "Assign Task" or "Assign" button — in the web version, this is usually near the top of the task form. Click it and type the name or email of the person you want to assign it to. Select their name from the dropdown list that appears.
Click "Save" or "Send" to send the task assignment. The other person will receive a notification that you have assigned them a task.
What happens after you send the assignment
The person you assigned the task to will see a notification in Outlook or Teams. They can open the task and choose to accept or decline it. If they accept, the task moves to their task list and they become the owner. You will see a notification that they accepted.
If they decline, the task comes back to your task list. You will see a notification that they declined, and you can either assign it to someone else or keep it yourself. A declined task does not disappear — it stays in your list until you decide what to do with it.
Once someone accepts a task you assigned, you can still see it in your task list, but it will show their name as the owner. You can view its status and see when it is marked complete, but you cannot edit it without asking them to make changes.
Who you can assign tasks to
You can only assign tasks to people who use Outlook or Microsoft Teams and are in your organization or contacts. If you try to assign a task to someone with a Gmail account or someone outside your organization who does not use Outlook, the assignment may not work or they may not receive a notification.
If you work in a large organization, you may need to use the full email address or search by department to find the right person. If the person does not appear in your contacts, ask for their full email address and type it in manually.
Common reasons an assignment does not work
The most common reason an assignment fails is that the person you are trying to assign to does not use Outlook or is not in your organization's directory. If you see an error message, check that you have the correct email address and that the person uses Outlook or Teams.
Another reason is that your organization's settings may restrict task assignments. Some workplaces turn off the ability to assign tasks for security or workflow reasons. If you cannot find the "Assign Task" button at all, ask your IT department whether task assignments are turned on for your account.
If you assigned a task but the other person never received a notification, check that their email address is correct. You can also try assigning it again or asking them to check their Outlook notifications manually.
Frequently Asked Questions
Can I assign a task to multiple people at once?
No. Outlook only lets you assign a task to one person at a time. If you need multiple people to work on something, you can create separate tasks and assign each one individually, or you can share a task list instead of assigning individual tasks.
What if someone accepts a task but then does not do it?
Once someone accepts a task, it is their responsibility. You can check the task status in your task list to see if it has been marked complete. If it has not been done by the due date, you can send them a message asking about it, but you cannot force them to complete it or take it back without their agreement.
Can I change a task after I assign it?
Once someone accepts a task, you cannot edit it directly. If you need to change the due date or add information, you have to ask the person who accepted it to make the change, or you can send them a separate message with the updated details.
What is the difference between assigning a task and sharing a task list?
Assigning a task sends one specific task to one person and asks them to accept ownership. Sharing a task list gives someone access to see and edit all tasks in a list you create. Use assignment when one person is responsible for one task; use sharing when multiple people need to see and work on the same list together.
Do I get notified when someone marks an assigned task complete?
Yes. When someone marks a task you assigned to them as complete, you will receive a notification in Outlook. You can then see the task status change in your task list.